I'm not saying jazz is important to understand noir origins. Not at all. How could it be? It's a minor component of some scores. Most are classical and heavily dramatic.

I'm suggesting how one might find further evidence to support your thesis. You say that noir has social influences that it arose out of.

Social influences might be widespread. They might affect other arts: painting, sculpture, literature, music. These arts have their definable alterations too. It's merely a possibility, based on the notion that if social influences are powerful enough and widespread enough, they'll affect many realms of endeavor. Maybe not all in sync, but in some recognizable ways. Changes from one style to another might be worthy of some examination.

The jazz example is that bigness gave way to smallness, hot gave way to cool. I didn't say that jazz IN noir was important. What might be of interest is whether arts in general are affected by the same social influences.

If noir came, as you mention, from literature, one source, then you are confirming that social influences affect literature.

If alienation is primary to noir, your thesis, then the question arises if it's also a notable feature of other arts. If not, why not?